1" Vim indent file 2" Language: Lua script 3" Maintainer: Marcus Aurelius Farias <marcus.cf 'at' bol.com.br> 4" First Author: Max Ischenko <mfi 'at' ukr.net> 5" Last Change: 2017 Jun 13 6 7" Only load this indent file when no other was loaded. 8if exists("b:did_indent") 9 finish 10endif 11let b:did_indent = 1 12 13setlocal indentexpr=GetLuaIndent() 14 15" To make Vim call GetLuaIndent() when it finds '\s*end' or '\s*until' 16" on the current line ('else' is default and includes 'elseif'). 17setlocal indentkeys+=0=end,0=until 18 19setlocal autoindent 20 21" Only define the function once. 22if exists("*GetLuaIndent") 23 finish 24endif 25 26function! GetLuaIndent() 27 " Find a non-blank line above the current line. 28 let prevlnum = prevnonblank(v:lnum - 1) 29 30 " Hit the start of the file, use zero indent. 31 if prevlnum == 0 32 return 0 33 endif 34 35 " Add a 'shiftwidth' after lines that start a block: 36 " 'function', 'if', 'for', 'while', 'repeat', 'else', 'elseif', '{' 37 let ind = indent(prevlnum) 38 let prevline = getline(prevlnum) 39 let midx = match(prevline, '^\s*\%(if\>\|for\>\|while\>\|repeat\>\|else\>\|elseif\>\|do\>\|then\>\)') 40 if midx == -1 41 let midx = match(prevline, '{\s*$') 42 if midx == -1 43 let midx = match(prevline, '\<function\>\s*\%(\k\|[.:]\)\{-}\s*(') 44 endif 45 endif 46 47 if midx != -1 48 " Add 'shiftwidth' if what we found previously is not in a comment and 49 " an "end" or "until" is not present on the same line. 50 if synIDattr(synID(prevlnum, midx + 1, 1), "name") != "luaComment" && prevline !~ '\<end\>\|\<until\>' 51 let ind = ind + shiftwidth() 52 endif 53 endif 54 55 " Subtract a 'shiftwidth' on end, else, elseif, until and '}' 56 " This is the part that requires 'indentkeys'. 57 let midx = match(getline(v:lnum), '^\s*\%(end\>\|else\>\|elseif\>\|until\>\|}\)') 58 if midx != -1 && synIDattr(synID(v:lnum, midx + 1, 1), "name") != "luaComment" 59 let ind = ind - shiftwidth() 60 endif 61 62 return ind 63endfunction 64